package com.ysd.util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBManager {
	private final static String DRIVER = "com.mysql.jdbc.Driver";
	private final static String URL = "jdbc:mysql://localhost:3306/manmanzahuopu";
	private final static String USER = "root";
	private final static String PWD = "admin";
	
	public static Connection getConnection() {
		//1,加载驱动
		try {
			Class.forName(DRIVER);
		//2,创建连接
			Connection conn = DriverManager.getConnection(URL, USER, PWD);
			return conn;
			
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}

	public static int executeUpdate(String sql) {
		Connection conn = getConnection();
		Statement st = null;
		try {
			//创建Statement(执行)对象
			 st = conn.createStatement();
			int n = st.executeUpdate(sql);
			return n;
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return -1;
		}finally {
			closeAll(conn,st,null);
		}
	}
	
	public static void closeAll(Connection conn,Statement st,ResultSet rs) {
		try {
			if(rs != null) {
				rs.close();
			}
			if(st != null) {
				st.close();
			}
			if(conn != null) {
				conn.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}